Spring tension device



Sept. 26, 1933. H. F. KOCH ET AL 1,928,106

SPRING TENSION DEVICE Filed May 10, 1933 INVENTORS Harlow e F/foch an ATTORN EY Patented Sept. 26, 1933 w l j srnnvG. TENsIoNpEvIoE I Harlowe F. Koch, Rochester, and Lawrence Wehner, Greece, N. Y., assignors toThe Haloid spring tension device, which While 'detachably= Company, Rochester, N. Y.,'-a corporation of New York This invention relates toza spring tensionf device, and is intended more particularly for imposing a drag on and centeringthe spool which supports a sensitized roll in a photo-copy machine.

fHeretofore, in machines of thischaracter, the

roll carrying spool has been controlled by springsbe detachably positioned on a wall of the .sensi' tized rollbox without requiring any permanent connection thereto. I 7

Another object of the invention is to afiforda held in operative, position, cooperateswith the spool supports in such a way that it is held against turning movement with relation to the container andfunctions properly in its relation to the spool while so mounted.

A further purpose of the improvement is to can be manufactured at a low cost, preferably in one piece, and can be adjusted so as to vary the 'tensionpon the spool and to properly center the .spool in the container.

To theseand other enda'the invention consists in the construction and arrangement of parts that will appear clearly from thefollowing description when read in conjunction with-the accompanying drawing, the novel featuresbeing pointed out in the claims following the specification. f r

In the drawing: v

Fig. 1 is a vertical sectional view, partially in machines, and showing the application of the invention in its preferred embodiment;

Fig. 2 is a transverse sectional view on line 22 of Fig. 1; g

Fig. 3 is a detail perspective View of the spring tension device removed from the container;

Fig. 4 is a transverse sectional view showing the application of a modified form of the device, and Fig. 5 is a perspective view of the modified form illustrated in Fig. 4. v V j In the construction illustrated in Figs. 1 to 3, 1 designates the end walls of the box or container having a removable cover 2. Theend walls 1 are provided with openings to receive removable spool supports or trunnions 3 which project inwise the roll ofsensitizedfpaper. thereon with The device, ;wh,ic'h is preferably integral pieceof springjsteel, comprises a body" or verticalportionlo having mean'satits upper f end for detachablyengaging a wallpf the con-F.

To accomplish this, the upp'erend,;is 7

provide a device of simple construction which wardly' into the box, and rotatably these supports 31S a spool 4 having ends S-that are spaced from-the endw'alls lot the box. 7

The spool 4 carries a roll for sensitized paper that is,--gdrawn"out"of thejbox over-ther 1L6 tothe other partscof the photo 'copy machine, aswell known in-fthea'rt, and thedevice forming the subject of "thisinvention iswremovably' locatedon the end wallsl between thesame and v "the; ends 5 of the, spool andj-serve-toimpose the proper drag 'or tensionl on the spool so that the paper'willnot .overr'unfas it drawnjirom' the box and also to center thespool and--like-.

reference't'o-the box.. I Y, :5.-

formed; of, an

tainer. preferably-bent upon itself as. at v 11, gafiording a slot 12 into, which the wall ofthe container 1 engages when the tension device is forced downwardly thereon. The slot 12 is;of suchflwidth ,that the device willengag'ethe wallwithisufiicient friction to preventaccidental removalv The body-portion 10, is. bowedputwardlmfas shownv in Fig. 3, and at its lower end terminates inthe inwardly bowedarcuatearms 13 vafiording: a send-circular portion. thatzembraces .the

circular trunnion or spool support-3, asshown in Fig. 2, thus preventing turningorotherimove direction except f ment of the tension device in any toward or from the wall 1.

- Intermediatethe upper and lower-endsofthe body 10 are thetarms 1e extendinginopposite directions and curving inwardly-afiordinga com vex yieldable portion, the-ends of, which engage the wall 1 onwhich the deviceis mounted while I the outwardly curved central portion engages the spool end 5 with sufficient tension to hold the latter against turningat excessive'speed as the paper is drawn therefrom Thearms 14, and:

likewise the arms 13, can be flexed .to a greater or less degree toward the wall 1 by slightly bending them before positioning the device, so as to varythe amount of drag or tension and also 5;. to vary the relative endwiserelation of the spool in order to center the latter correctlyin theboxp The structure shown inFigs. 1"to 3 isadapted' to one known style of photo cop'y machine,=anda in Figs. 4 and 5 there is illustrated 'a slightly sion.

closer to the top or cover of the container. In this arrangement, instead of having the reversely turned portion 11 in alinement with the body portion 10, these parts are arranged in an angular relationrto each other, the portion 16 being bent backwardly upon the body 17 at the anglev shown in Fig. 5, so that whenthe device is positioned in the box, the body portion 17 extends upwardly from the [spool at an angle to the vertical, as shown in Fig. 4. In other respects, the structure and function of the parts I is the same as with the form disclosed in Figs.

A device of this kind can be quickly positioned, or removed from the Wall of a sensitized roll box, and can be easily adjusted to vary the ten- 7 If broken, it can be readily replaced so that the operation of. the machine is not interrupted, and it can be manuiaotured and'supplied at a low cost for use on any standard types of machines.

While the structure has been described with reference to a particular embodiment, it is not confined to the details disclosed, and this application is intended'tocover' any changes or departures coming within the contemplatedpurposes of the inventionor the scope of the follow-' ing claims. b

We claim; a b I 'Thecombination with a box including oppositely disposed walls having inwardly projecting- I spool supports, of a roll carrying spool rotatably mounted on said supports and havingenns spaced from said walls of a spool tensioning device de tachably mounted on each of said walls andcomprisinga convex spring portion, the ends of which engage the adjacentwall and the center of which engages the adjacent end of the spool, and locking means'engageable withthe spool support for preventing turning of the tension device.

- 2; The combination with arbox including oppositelydisposed walls, having inwardly projecting spool supports, of a roll carrying spool rotatably mountedonsaid supports and having ends spaced from said walls, of a spool tensioningdevice detachably moimted 'on each of said walls and. comprising a convex spring. portion, 'the'ends'ofwhich engagethe adjacentwall and the center of which engages theadjacent end of the spool, and'an arc-shaped locking member engageable with said-spool support and acting to prevent turning of the tension device.

3. The combination with a boxincluding'oppositely disposed walls having inwardly projecting spool supports, of a roll carrying spool rotatably mounted on said supports and having ends spaced from said walls,"of spool tensioning "devices each comprising means at its upper end spool end and the adjacent wall.

for detachably engaging the wall, means at its lower end having locking engagement with said spool support to prevent turning of the spool tensioning device, and means intermediate its ends having yieldable engagement with the adjacent 4. The combination witha box including oppositely disposed walls having inwardly projecting spool supports, of a roll carrying'spool rotatably' mounted on said supports and having ends spaced from said walls, of spool tensioning devices eachcomprising a yieldable spring body having a portion bent upon itself at its upper end for engagement with the wall, arc-shaped arms at its lower'end .for engagement withthe spool support, and oppositely extending convex arms'intermediate the ends for engagement with opposed surfaces'of the wall and spool end respectively.- c

5. A spring tension device comprising a central' body portion havingone end bent-upon itself affording means for detachably engaginga Wall, the opposite end terminating in" ar cuate arms affording means for engagement with a spool supportQan'd oppositely projecting arms iritermediate "the ends aflfording a convex spring portion, the 'endsiof which are engageable with an adjacent 'walland the convex central portion of which is engageable with a rotatable spool.

6. A spring tension device comprising body -po-rtiohhaving one end bent upon itself affording means for detachably engaginga wall, the opposite end terminating. in a locking portion engageablewitha spool support to prevent turning of the device, and oppositelyprojecting arms intermediate the ends affording a convex spring portion, the ends of which are engageable with .anadjacent .wall and thei'convex central portion '2. A spring tension device comprising a central body portion having means at its upper end for} detachablyengaging a support,and oppositely projecting arms affording a convex spring" portion, the ends of which are engageable with an adjacent wall and the central portion of which 190 is engageable with a rotatable spool.

8. A spring tension device comprising: a central body portion having means at'its' upperend for detachably engaging. a support, a locking portion engageable with a spool support to prevent turning of the device, and oppositely projecting arms afiording a convex spring portion, theends of which are engageable with an adjacent wall and the central portion of which is engageable with a rotatable spool; ,7 130 1 I-IARLOWE EKQGH.

LAWRENCE WEHNER.

a central "1 I 

